\(2.\left(3x+5\right)=25\)
\(3x+5=\frac{25}{2}\)
\(3x=\frac{15}{2}\)
\(x=\frac{5}{2}\)
Vậy ...
2 . ( 3x + 5 ) = 25
3x + 5 = 25 : 2
3x + 5 = 25/2
3x = 25/2 - 5
3x = 15/2
x = 15/2 : 3
x = 5/2
\(2\left(3x+5\right)=25\)
\(\Rightarrow3x+5=\frac{25}{2}\)
\(\Rightarrow3x=\frac{15}{2}\)
\(\Rightarrow x=\frac{15}{2}:3\)
\(\Rightarrow x=\frac{5}{2}\)